Adding a skeleton for scanned dependencies in the summary.

src/summary.ts

@@ -1,6 +1,7 @@
 import * as core from '@actions/core'
 import {ConfigurationOptions, Change, Changes} from './schemas'
 import {SummaryTableRow} from '@actions/core/lib/summary'
+import {groupDependenciesByManifest} from './dependency-graph'
 
 export function addSummaryToSummary(
   addedPackages: Changes,
@@ -150,6 +151,25 @@ export function addLicensesToSummary(
   }
 }
 
+export function addScannedDependencies(changes: Changes): void {
+  const dependencies = groupDependenciesByManifest(changes)
+  const manifests = dependencies.keys()
+
+  const summary = core.summary
+    .addHeading('Scanned Dependencies')
+    .addRaw(`We scanned ${dependencies.size} manifest files:`)
+
+  for (const manifest of manifests) {
+    const deps = dependencies.get(manifest)
+    if (deps) {
+      const dependencyNames = deps.map(
+        dependency => `<li>${dependency.name}</li>`
+      )
+      summary.addRaw(`<h3>${manifest}</h3><ul>${dependencyNames.join('')}</ul>`)
+    }
+  }
+}
+
 function getManifests(changes: Changes): Set<string> {
   return new Set(changes.flatMap(c => c.manifest))
 }